Intumescent seal



FIG. 1 is a perspective view of the intumescent seal of the present invention;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view with a right side elevational view being a substantial mirror image thereof;

FIG. 4 is a back elevational view thereof; and,

FIG. 5 is a bottom plan view with a top plan view being a substantial mirror image thereof.

The intumescent seal is broken on the ends to indicate indefinite length. 

The ornamental design of an intumescent seal, as shown and described. 